October 29, 2010

Eyjafjallajökull Volcano, Iceland

Photograph by Sigurdur Hrafn Stefnisson

This Month in Photo of the Day: National Geographic Magazine Features

Lightning veins the Eyjafjallajökull volcano's ash plume, which roiled air travel this spring. Such "dirty thunderstorms" may occur when rock and ice particles loosed by exploding magma collide in the atmosphere.

See more photos from the 2010 Visions of Earth gallery.



See more photos of this Iceland volcano »
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